Fermi Quotes & Sayings

Such a weapon goes far beyond any military objective and enters the range of very great natural catastrophes. By its very nature it cannot be confined to a military objective but becomes a weapon which in practical effect is almost one of genocide — Enrico Fermi

Some people stick with the traditional, feeling struck by the epic beauty or blown away by the insane scale of the universe. Personally, I go for the old existential meltdown followed by acting weird for the next half hour. But everyone feels something. — Enrico Fermi

I remember my friend Johnny von Neumann used to say, 'with four parameters I can fit an elephant and with five I can make him wiggle his trunk.' — Enrico Fermi

The apparent incompatibility between the abundance of habitable planets in our Galaxy and the lack of extraterrestrial visitors, known as the Fermi paradox, suggest the existence of what Hanson calls a "Great Filter," an evolutionary/technological roadblock somewhere along the developmental path from nonliving matter to space-colonizing life. If we discover independently evolved primitive life in our Solar System, this would suggest that primitive life is not rare, and that the roadblock lies after our current human stage of development-perhaps because assumption 1 is false, or because almost all advanced civilizations self-destruct before they are able to colonize. I'm therefore crossing my fingers that all searches for life on Mars and elsewhere find nothing: this is consistent with the scenario where primitive life is rare but we humans got lucky, so that we have the roadblock behind us and have extraordinary future potential. — Max Tegmark

So, you know, Fermi's paradox has its answer, which is this: by the time life gets smart enough to leave its planet, it's too smart to want to go. Because it knows it won't work. So it stays home. It enjoys its home. As why wouldn't you? It doesn't even bother to try to contact anyone else. Why would you? You'll never hear back. So that's my answer to the paradox. You can call it Euan's Answer. — Kim Stanley Robinson

There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery — Enrico Fermi

The most striking impression was that of an overwhelming bright light. I had seen under similar conditions the explosion of a large amount - 100 tons - of normal explosives in the April test, and I was flabbergasted by the new spectacle. We saw the whole sky flash with unbelievable brightness in spite of the very dark glasses we wore. Our eyes were accommodated to darkness, and thus even if the sudden light had been only normal daylight it would have appeared to us much brighter than usual, but we know from measurements that the flash of the bomb was many times brighter than the sun. In a fraction of a second, at our distance, one received enough light to produce a sunburn. I was near Fermi at the time of the explosion, but I do not remember what we said, if anything. I believe that for a moment I thought the explosion might set fire to the atmosphere and thus finish the earth, even though I knew that this was not possible. — Emilio Segre

When asked what he meant by a miracle: Oh, anything with a probability of less than 20%. — Enrico Fermi

Young man, if I could remember the names of these particles, I would have been a botanist. — Enrico Fermi

The fact that no limits exist to the destructiveness of this weapon [the 'Super', i.e. the hydrogen bomb] makes its very existence and the knowledge of its construction a danger to humanity as a whole. It is necessarily an evil thing considered in any light. For these reasons, we believe it important for the President of the United States to tell the American public and the world what we think is wrong on fundamental ethical principles to initiate the development of such a weapon. — Enrico Fermi

The universe is a dark forest. Every civilization is an armed hunter stalking through the trees like a ghost, gently pushing aside branches that block the path and trying to tread without sound. Even breathing is done with care. The hunter has to be careful, because everywhere in the forest are stealthy hunters like him. If he finds other life - another hunter, an angel or a demon, a delicate infant or a tottering old man, a fairy or a demigod - there's only one thing he can do: open fire and eliminate them. In this forest, hell is other people. An eternal threat that any life that exposes its own existence will be swiftly wiped out. This is the picture of cosmic civilization. It's the explanation for the Fermi Paradox. — Liu Cixin

My wife believes in it not one whit, but is scrupulous in its observance," said Charles Leiden, sipping from his glass. "A curious state of affairs, don't you think? We are kosher, Fermi probably attends synagogue, Albert believed in Spinoza's God and helped raise money for Israel, Teller may end up teaching in a Jewish parochial school one day, Szilard has the soul of a Jewish prophet. And we tinker with light and atomic bombs, with the energy of the universe. Do you wonder that the world doesn't know what to make of its Jews? No one is on more familiar terms with the heart of the insanity in the universe than is the Jew, and no one is more frenetic and untidy in the search for the an answer. — Chaim Potok

I hope it won't take long. — Enrico Fermi

It is clear that the use of such a weapon cannot be justified on any ethical ground which gives a human being a certain individuality and dignity even if he happens to be a resident of an enemy country. — Enrico Fermi

I had become a bit annoyed with Fermi . . . when he suddenly offered to take wagers from his fellow scientists on whether or not the bomb would ignite the atmosphere, and if so, whether it would merely destroy New Mexico or destroy the world. — Richard Rhodes

If I could remember the names of all these particles, I'd be a botanist — Enrico Fermi

The apparent size and age of the universe suggests that many technologically advanced extra-terrestrial civilizations ought to exist. However, this hypothesis seems inconsistent with the lack of observational evidence to support it." Or "Where is everybody?" The Fermi Paradox Enrico Fermi, Los Alamos, 1950 — Ralph Kern

One might be led to question whether the scientists acted wisely in presenting the statesmen of the world with this appalling problem. Actually there was no choice. Once basic knowledge is acquired, any attempt at preventing its fruition would be as futile as hoping to stop the earth from revolving around the sun. — Enrico Fermi

Fermi started to calculate on his own, saying nothing, and in a direct, simple way found the essential point. The ability of a centrifuge to separate U-235 from U-238 was proportional to its length and to the fourth power of the peripheral speed of its rotor. Karl — Gregory Benford

Whatever Nature has in store for mankind, unpleasant as it may be, men must accept, for ignorance is never better than knowledge. — Enrico Fermi

There is no democracy in physics. We can't say that some second-rate guy has as much right to opinion as Fermi. — Luis Walter Alvarez

Experimental confirmation of a prediction is merely a measurement. An experiment disproving a prediction is a discovery. — Enrico Fermi

The word meltdown had not yet entered the reactor engineer's vocabulary - Fermi was only then inventing that specialty - but that is what Compton was risking, a small Chernobyl in the midst of a crowded city. — Richard Rhodes

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission. — Enrico Fermi

The solvable systems are the ones shown in textbooks. They behave. Confronted with a nonlinear system, scientists would have to substitute linear approximations or find some other uncertain backdoor approach. Textbooks showed students only the rare non-linear systems that would give way to such techniques. They did not display sensitive dependence on initial conditions. Nonlinear systems with real chaos were rarely taught and rarely learned. When people stumbled across such things-and people did-all their training argued for dismissing them as aberrations. Only a few were able to remember that the solvable, orderly, linear systems were the aberrations. Only a few, that is, understood how nonlinear nature is in its soul. Enrico Fermi once exclaimed, "It does not say in the Bible that all laws of nature are expressible linearly!" The mathematicians Stanislaw Ulam remarked that to call the study of chaos "nonlinear science" was like calling zoology "the study of nonelephant animals. — James Gleick

Before I came here, I was confused about this subject. Having listened to your lecture, I am still confused
but on a higher level. — Enrico Fermi

Where is everybody? Humans could theoretically colonize the galaxy in a million years or so, and if they could, astronauts from older civilizations could do the same. So why haven't they come to Earth? — Enrico Fermi

An experiment disproving a prediction is discovery. — Enrico Fermi

When Enrico Fermi built the first nuclear reactor, he suspended the control rods from a rope tied to a balcony railing. In case something went wrong, next to the railing was stationed a distinguished physicist with an axe. This led to the probably apocryphal story that SCRAM stands for "Safety Control Rod Axe Man. — Anonymous

In desperation I asked Fermi whether he was not impressed by the agreement between our calculated numbers and his measured numbers. He replied, "How many arbitrary parameters did you use for your calculations?" I thought for a moment about our cut-off procedures and said, "Four." He said, "I remember my friend Johnny von Neumann used to say, with four parameters I can fit an elephant, and with five I can make him wiggle his trunk." With that, the conversation was over. — Freeman Dyson

Never underestimate the joy people derive from hearing something they already know. — Enrico Fermi

Although the problem of transmuting chemical elements into each other is much older than a satisfactory definition of the very concept of chemical element, it is well known that the first and most important step towards its solution was made only nineteen years ago by the late Lord Rutherford, who started the method of the nuclear bombardments. — Enrico Fermi

No, it wasn't. It was the scariest fucking answer to Fermi's paradox I can think of. Do you know why there aren't any Indians in your Old West analogy? Because they're already dead. The whatever-they-were that built all that got a head start and used their protomolecule gate builder to kill all the rest. And that's not even the scary part. The really frightening part is that something else came along, shot the first guys in the back of the head, and left their corpses scattered across the galaxy. The thing we should be asking is, who fired the magic bullet? — James S.A. Corey

During the Trinity test of the very first atom bomb, Fermi wondered if the detonation would ignite the Earth's atmosphere. They just didn't know, you see. We think the quantum disruption won't propagate. If it does, then the whole universe gets converted into energy. — Peter F. Hamilton

Fermi turned to Bohr with weary eyes and a slanted smile, and shrugged. "So we thought we had discovered new elements. We even named them - hesperium, ausonium. Wrong! Mythical! They were ordinary old barium and iodine. We were careful - too careful. — Gregory Benford

Fermi thought plutonium production needed an area a mile wide and two miles long for safety. Compton proposed building piles of increasing power to work up to full-scale production and was considering alternative sites in the Lake Michigan Dunes area and in the Tennessee Valley. — Richard Rhodes

It does not say in the Bible that all laws of nature are expressible linearly! — Enrico Fermi